提取一个量能老指标部分源码，稍作修改。
记不清原作者，也记不清指标名称，姑且就叫量能趋势吧。
此公式是以成交量为依据研判多空趋势转换，一目了然。
在此向原作者表示感谢！
指标说明：
1、以20日成交量移动平均线为基准，并多日移动平均；
2、黄色成交量均线为短期线、褐色成交量均线为中期线、蓝色成交量均线为长期线；
3、和股价的平均线原理相同，分多头排列和空头排列；
4、多头排列介入并持股；
5、空头排列出局空仓；

{股海网提供：www.guhai.com.cn}

源码：
VAR0:=EMA(VOL,20);
VAR1:= VAR0 + 2*STD(VOL,10);
VARA1:=VOL;
C1: (EMA(VARA1,2)+EMA(VARA1,5)+EMA(VARA1,8))/3,LINETHICK2, COLORYELLOW;
C2: (EMA(VARA1,3)+EMA(VARA1,6)+EMA(VARA1,9))/3,COLORRED ;
C3: (EMA(VARA1,4)+EMA(VARA1,7)+EMA(VARA1,10))/3,COLORRED ;
C4: (EMA(VARA1,5)+EMA(VARA1,8)+EMA(VARA1,11))/3,COLORRED ;
C5: (EMA(VARA1,6)+EMA(VARA1,9)+EMA(VARA1,12))/3,COLORRED;
C6: (EMA(VARA1,7)+EMA(VARA1,10)+EMA(VARA1,13))/3,COLORRED;
C7: (EMA(VARA1,8)+EMA(VARA1,11)+EMA(VARA1,14))/3,COLORRED;
C8: (EMA(VARA1,9)+EMA(VARA1,12)+EMA(VARA1,15))/3,COLORRED;
C9: (EMA(VARA1,10)+EMA(VARA1,13)+EMA(VARA1,16))/3,COLORRED;
C10: (EMA(VARA1,11)+EMA(VARA1,14)+EMA(VARA1,17))/3,COLORRED;
C11: (EMA(VARA1,12)+EMA(VARA1,15)+EMA(VARA1,18))/3,COLORRED;
C12: (EMA(VARA1,13)+EMA(VARA1,16)+EMA(VARA1,19))/3,COLORRED;
C13: (EMA(VARA1,14)+EMA(VARA1,17)+EMA(VARA1,20))/3,COLORRED;
C14: (EMA(VARA1,15)+EMA(VARA1,18)+EMA(VARA1,21))/3,COLORRED;
C15: (EMA(VARA1,16)+EMA(VARA1,19)+EMA(VARA1,22))/3,COLORRED;
C16: (EMA(VARA1,17)+EMA(VARA1,20)+EMA(VARA1,23))/3,COLORRED;
C17: (EMA(VARA1,18)+EMA(VARA1,21)+EMA(VARA1,24))/3,COLORRED;
C18: (EMA(VARA1,19)+EMA(VARA1,22)+EMA(VARA1,25))/3,COLORRED;
C199: (EMA(VARA1,20)+EMA(VARA1,23)+EMA(VARA1,26))/3,LINETHICK3, COLOR0099FF;
   
C20: (EMA(VARA1,21)+EMA(VARA1,24)+EMA(VARA1,27))/3,COLOR00CC33;
C21: (EMA(VARA1,22)+EMA(VARA1,25)+EMA(VARA1,28))/3,COLOR00CC33;
C22: (EMA(VARA1,23)+EMA(VARA1,26)+EMA(VARA1,29))/3,COLOR00CC33;
C23: (EMA(VARA1,24)+EMA(VARA1,27)+EMA(VARA1,30))/3,COLOR00CC33;
C24: (EMA(VARA1,25)+EMA(VARA1,28)+EMA(VARA1,31))/3,COLOR00CC33;
C25: (EMA(VARA1,26)+EMA(VARA1,29)+EMA(VARA1,32))/3,COLOR00CC33;
C26: (EMA(VARA1,27)+EMA(VARA1,30)+EMA(VARA1,33))/3,COLOR00CC33;
C27: (EMA(VARA1,28)+EMA(VARA1,31)+EMA(VARA1,34))/3,COLOR00CC33;
C28: (EMA(VARA1,29)+EMA(VARA1,32)+EMA(VARA1,35))/3,COLOR00CC33;
C29: (EMA(VARA1,30)+EMA(VARA1,33)+EMA(VARA1,36))/3,COLOR00CC33;
C30: (EMA(VARA1,31)+EMA(VARA1,34)+EMA(VARA1,37))/3,COLOR00CC33;
C31: (EMA(VARA1,32)+EMA(VARA1,35)+EMA(VARA1,38))/3,COLOR00CC33;
C32: (EMA(VARA1,33)+EMA(VARA1,36)+EMA(VARA1,39))/3,COLOR00CC33;
C33: (EMA(VARA1,34)+EMA(VARA1,37)+EMA(VARA1,40))/3,COLOR00CC33;
C34: (EMA(VARA1,35)+EMA(VARA1,38)+EMA(VARA1,41))/3,COLOR00CC33;
C35: (EMA(VARA1,36)+EMA(VARA1,39)+EMA(VARA1,42))/3,COLOR00CC33;
C36: (EMA(VARA1,37)+EMA(VARA1,40)+EMA(VARA1,43))/3,COLOR00CC33;
C37: (EMA(VARA1,38)+EMA(VARA1,41)+EMA(VARA1,44))/3,COLOR00CC33;
C38: (EMA(VARA1,39)+EMA(VARA1,42)+EMA(VARA1,45))/3,COLOR00CC33;
C399: (EMA(VARA1,40)+EMA(VARA1,43)+EMA(VARA1,46))/3,LINETHICK2, COLORBLUE;
C111: (EMA(VARA1,2)+EMA(VARA1,5)+EMA(VARA1,8))/3,LINETHICK2, COLORYELLOW;